JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 137
·期 2
·48279
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IF 2.188
Yan Song,Fang-Fei Wang,Guan-Xiu Lu,Lin-Yuan Zhou,Qing-Biao Yang
Two kinds of PEI (Polyethyleneimine) nanofibers membrane were successfully prepared by electrospinning and crosslinking technology, which were insoluble in water. One Polyethyleneimine/ Epichlorohydrin/ Polyacrylonitrile nanofibrous films (abbreviated as PEI/ EPI/ PAN NFs) was prepared by in situ crosslinking of PEI/PAN nanofiber containing of EPI, and the other PEI/ PAN/ EPI NFs was prepared by crosslinking PEI/ PAN nanofibers using EPI solution. The composition and morphology of nanofibers before and after crosslinking were investigated by infrared spectroscopy and scanning electron microscopy. PEI/EPI/PAN nanofibers exhibited excellent adsorption properties toward heavy metal ions and methyl orange dyes, which can also be reused multiple times. The adsorption rate of methyl orange remained around 75% after 4 cycles, meanwhile, the adsorption rate of copper and lead still remained around 90% after 5 cycles. In addition, we found that PEI/ PAN/ EPI nanofibers prepared by solution crosslinking technology solved the problem of easy gel formation in in situ crosslinking technology and facilitated the continuous production of PEI/ EPI/ PAN nanofibers, which is better than in situ crosslinking technology. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48279.
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MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Ying Song,Jinlei Chen,Xiaobin Yang,De Zhang,Yanqiu Zou,Dejiang Ni,Jiaming Ye,Zhi Yu,Qiang Chen,Shangzhong Jin,Pei Liang
Fe 3 O 4 magnetic nanoparticles with a particle size of ∼ 250 nm were synthesized by the thermal solvent method, and then modified with polyethyleneimine (PEI) as the intermediate layer on the Fe 3 O 4 surface to form ultra-thin polymer interlayer to replace the traditional carbon shell and silicon shell interlayer. The seeding of Fe 3 O 4 magnetic particles was completed thanks to the strong positive charge of the amino group of PEI-adsorbed 3–5 nm colloidal gold on the surface of magnetic beads, and the addition of silver nitrate and reducing agent to the magnetic microsphere enabled the silver shell to be coated on the surface of the magnetic microspheres almost without affecting their magnetism. Moreover, the effects of the additive amount of colloidal gold, silver nitrate and ultrasonic time on the magnetic nanoparticles were systematically studied. Morphology and characterization analysis showed that the prepared Fe 3 O 4 @Ag magnetic nanoparticles (MNPs) had uniform particle size, good dispersibility, strong magnetic response, and powerful SERS performance. Furthermore, the SERS performance of the composite nanometer material was investigated by using 4-aminophenol and pesticide paraquat as active targets, with the molecular concentration down to 10 -8 M and 10 -10 M, respectively, confirming that the functional composite had a good SERS activity and Fe 3 O 4 magnetic core.
研究领域:
材料科学
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环境科学
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分析化学
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ACS Applied Materials & Interfaces
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2018
·
IF 8.097
Dan-Dan Zhang,Zhi-Yong Guo,Peng-Fei Guo,Xue Hu,Xu-Wei Chen,Jian-Hua Wang
Polyoxometalate [{a-PW11O39Zr(μ-OH)(H2O)}2]8– (POM1) is first prepared by sandwiching ZrIV among 2 mono-lacunary α-Keggin polyoxometalates, and then novel magnetic nanoparticles (NPs), Fe3O4@polyethyleneimine (PEI)@POM1, are fabricated by coating POM1 onto the surface of magnetic Fe3O4@PEI NPs under electrostatic interaction. The obtained Fe3O4@PEI@POM1 NPs are characterized by Fourier transform infrared, zeta potential, vibrating sample magnetometer, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. Ascribed to the hydrogen-bonding and electrostatic interactions, the NPs exhibit high adsorption selectivity toward IgG, and the adsorption capacity is high up to 304 mg g–1 under optimal adsorption conditions. By using 0.01% cetyl trimethylammonium bromide to strip the adsorbed protein species, an elution efficiency of 95% is achieved. The feasibility of Fe3O4@PEI@POM1 NPs in real-world sample assay has been demonstrated by the selective isolation of IgG heavy chain and light chain from human serum, as confirmed by the sodium dodecyl sulfate polyacrylamide gel electrophoresis assay.
研究领域:
纳米技术
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材料科学
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生物化学
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分析化学
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PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 92
·75380-75385
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IF 3.84
Han Wang,Xiaomin Wang
Graphene quantum dots surface passivated by polyethylenimine (GQDs-PEI) were prepared with a simple solvothermal method. Compared with the unfunctionalized graphene quantum dots (GQDs), the GQDs-PEI were well dispersed with an ultrasmall average diameter of ca. 1.66 nm, and have achieved better optical properties including high quantum yield (53.0%) and narrow emission spectral features which is probably because of the positively charged amines on PEI which facilitated the dispersion of GQDs. By being applied to the bioimaging of MG-63 cells, the GQDs-PEI showed brighter luminescence and minor cytotoxicity. Moreover, the GQDs-PEI are clearly rendered in the nucleus region, which offered a further application in the diagnosis of diseased phenotypes and the targeted therapy of tumour cells.
研究领域:
纳米技术
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材料科学
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生物医学工程
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细胞生物学
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Tianran Zhang,Bofeng Shi,Siyu Zhang,Mengfan Song,Jiping Wang,Lixue Zhang,Fang Kang
Due to the development of advanced electronic systems, there is an urgent need for polymer dielectric film capacitors with high breakdown strength ( E b ) and high discharge energy density ( U d ) at elevated temperatures. Herein, an all-organic blend polymer composite is fabricated by blending polyetherimide (PEI) and a trace amount of Poly(vinylidene fluoride) (PVDF), achieving nanoscale phase separation and forming interfaces between PEI and PVDF grain. The real permittivity ( ε r ) and E b of blend composites are simultaneously enhanced after PVDF introduction. It is worth noting that increasing the temperature does not reduce the E b of the PEI/xPVDF blend composite. Our Study shows that optimizing the plasticity and storage modulus of PEI/xPVDF significantly contributes to maintaining E b at elevated temperatures. Additionally, high temperatures enhance the entanglement of molecular chains at the PVDF-PEI interface, further supporting the preservation of E b . Finally, a high E b of 540 MV/m, a high U d of 5.92 J/cm 3 are achieved for the PEI/0.5PVDF blend at 150 °C. This work presents a new approach to enhance the E b of dielectric polymers by optimizing mechanical properties at high temperature, which providing a different strategy for enhancing the energy storage performance.
研究领域:
材料科学
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能源存储
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PROGRESS IN ORGANIC COATINGS
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2026
·
IF 7.9
Jiaying Liu,Guoqing Xiao,Mingtan Wang,Chunyan Chen,Chunlin Chen,Shuyu Fu
Waterborne epoxy (EP) coatings are widely used for fire protection of steel structures due to their environmental friendliness and cost-effectiveness. Although significant progress has been made in the development of fire-retardant coatings, a key challenge remains regarding their long-term stability under harsh environments with strong ultraviolet (UV) radiation. To address this challenge, this study employed layered α-ZrP nanosheets as a substrate, polyethylenimine (PEI) as a bridging agent and tannic acid (TA) as a functional modifier, to prepare TA/PEI@ZrP hybrids via a Schiff base reaction. These hybrids were then incorporated into an EP intumescent fire-retardant coating to fabricate a TA/PEI@ZrP/EP composite coating. Accelerated aging tests demonstrated that the incorporation of TA/PEI@ZrP improved gloss retention and reduced the degradation of EP structures. Fire performance tests demonstrated that the composite coating exhibits excellent fire resistance. The Bronsted acid sites (BAS) of ZrP catalyzed the formation of a dense and high-strength intumescent char layer, which reduced the backside temperature of the steel substrate from 236.8 °C to 184.7 °C. The char expansion height and expansion ratio increased from 5.73 mm and 5.18 to 23.1 mm and 17.63, respectively. These results indicate that the composite coating exhibits both enhanced fire resistance and improved UV durability, leading to an overall improvement in protective performance. This work provides new insights into the design of multifunctional composite coatings with long-term stability and high-efficiency UV resistance.
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COMPOSITES PART B-ENGINEERING
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2026
·
IF 14
Yutao Yan,Yixian Ma,Xinyu Wang,Yin He,Jinhui Wang,Xi Guo,Yi Zhang,Jianzhang Li,Weidong Gu,Weisheng Sun
The strength and toughness of thermosetting phenolic formaldehyde (PF) resin are generally mutually exclusive, often leading to stress concentration and interfacial cracking within bamboo-based composites, which severely limits their mechanical performance and service life. The preparation of PF resin that combine high rigidity, high toughness, and strong interfacial adhesion remains a major challenge. Here, we designed a core-shell structured poly(ethylene imine)-polyhedral oligomeric silsesquioxane (PEI-POSS) hybrid to simultaneously enhance the toughness of the PF resin and the bonding interface in bamboo composites. With 2.5 wt% PEI-POSS, the modified PF resin showed increases in flexural modulus and impact toughness by 70.92% and 76.92%, respectively. This improvement is attributed to the fact that the molecular mixture with linear and hyperbranched topological structures forms uniform molecular holes or free volumes. Applied in bamboo composites, the modified resin promoted uniform stress distribution, enhanced interface modulus by 43.08%, and improved dry/wet shear strength by 34.24% and 31.97%, due to improved penetration and chemical bonding with bamboo cell walls. This work resolves the conflict between strength and toughness in PF resin, providing an effective strategy for developing high-performance bamboo composite interfaces.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Jiatong Li,Weida Liang,Xinyu Liu,Xiaoli Xu,Yunye Cao,Lingling Zhao,Xiaolong Zhu,Jianghuan Shi,Hongze Liang
The escalating demand for rare earth elements (REEs) necessitates efficient adsorbents for REE(III) recovery. Herein, a low-cost composite (OAC–PEI–MP) is engineered by grafting polyethyleneimine (PEI) and phosphonic acid ligands onto oxidized activated carbon, creating highly abundant REE(III) binding sites. Comprehensive characterization (SEM, FTIR, XPS, ζ-potential, N2 physisorption) confirms successful functionalization. Adsorption evaluations for Nd(III) (light REE) and Yb(III) (heavy REE) demonstrate pH-/temperature-/concentration-dependent capacities, with isothermal and kinetic behaviors fitting Langmuir and pseudo-second-order models, respectively. Remarkable selectivity is observed in binary systems (La/Ni, Sm/Co). OAC–PEI–MP shows high preferential enrichment toward REEs from the leachate of the NdFeB magnet, highlighting its potential for industrial REE separation.
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PROGRESS IN ORGANIC COATINGS
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2026
·
IF 7.9
Gang Tang,Zhen Zhang,Wenhao Li,Mingjie Guo,Ying Pan,Wei Wang,Tingxuan Yan,Lulu Xu,Dong Wang,Fan Wu,Xiuyu Liu
Modern environments impose complex safety requirements on textiles. Therefore, developing multifunctional textiles with integrated flame retardancy, electromagnetic interference (EMI) shielding, and antibacterial properties is of great significance. In this study, a robust ternary P/N/Ag nanocoating was constructed on cotton fabrics via layer-by-layer (LbL) assembly of phytic acid (PA) and polyethyleneimine (PEI), followed by the impregnation of a silver nanowire (AgNW) conductive network. This hierarchical architecture endowed the cotton fabric with exceptional multifunctionality. The optimized composite fabric exhibited superior fire safety, achieving a limiting oxygen index (LOI) of up to 49.8% and a 91.7% reduction in peak heat release rate (PHRR). Mechanistic investigation revealed that the AgNWs act as reinforcing skeletons within the intumescent char layer, significantly enhancing the condensed-phase barrier effect against heat and oxygen. Furthermore, the construction of a highly conductive network resulted in a low sheet resistance of 2.09 Ω·mm and an EMI shielding effectiveness (SE) of 32.65 dB in the X-band. Additionally, the functionalized fabric demonstrated excellent ultraviolet (UV) resistance (Ultraviolet Protection Factor (UPF) > 130) and strong antibacterial activity, with a 99.9% reduction rate against both E. coli and S. aureus . This work provides a facile and effective strategy for fabricating high-performance multifunctional textiles with promising applications in personal protection and smart electronics.
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ANALYTICA CHIMICA ACTA
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2026
·
IF 6.1
Shuqi Wang,Shuzhen Zheng,Hongzhi Lu,Changsheng Wang,Shoufang Xu
Background Glyphosate (GLY) residues are difficult to remove from agricultural products and pose potential risks to food safety, making their sensitive detection highly desirable. In this study, a Cu 2+ -mediated ratiometric fluorescence sensing platform was constructed for the sensitive detection of GLY by physically mixing polydopamine-polyethyleneimine copolymer dots (PDA-PEI CPDs) with terephthalic acid (PTA) based on a competitive coordination strategy. Results Cu 2+ coordinated with the amino groups on the surface of CPDs and the carboxyl groups of PTA to form a CPDs-PTA-Cu 2+ complex. This process quenched the green fluorescence of CPDs at 530 nm while generating a new blue emission at 450 nm. Upon the addition of GLY, competitive coordination between GLY and Cu 2+ disrupted the complex, resulting in fluorescence recovery at 530 nm and fluorescence quenching at 450 nm, thereby producing a ratiometric fluorescence response. The sensor shows linear ranges of 0-80 μg/mL for GLY (LOD = 5.73 ng/mL). To meet the requirements of on-site applications, a CPDs-Cu 2+ @sodium alginate hydrogel was further prepared. Under 365 nm excitation, the hydrogel responded to GLY through single-emission fluorescence recovery at 530 nm. The hydrogel enabled smartphone-assisted RGB quantitative analysis and in situ semi-quantitative screening of GLY on vegetable surfaces using a wearable hydrogel patch. Significance By integrating solution-phase ratiometric fluorescence quantification with hydrogel-based visual readout, a simple and portable sensing platform was established for accurate GLY determination and visual screening of surface residues.
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Journal of Environmental Sciences
·
2025
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IF 6.3
Rui Ma,Xinjie Cui,Youyi Liu,Qianhui Xu,Weiwei Wang,Guangze Nie
Nanocomposites fabricated through the encapsulation of hydrated Zr(IV) oxide (HZO) nanoparticles within millimeter-scale hosts have emerged as promising candidates for phosphate sequestration from water. However, achieving ultrasmall nanoparticles within these hosts that maintain high decontamination reactivity is still a significant challenge. Herein, a novel nanocomposite (denoted HZO@CS-PEI) was obtained by confining the growth of HZO in dual crosslinked network hydrogels composed of interpenetrating chitosan (CS) and polyethyleneimine (PEI). Benefiting from the confinement effect of the dual cross-linked structure, the HZO within HZO@CS-PEI exhibited an ultrasmall size of approximately 2.16 nm. The incorporation of PEI enhanced both phosphate sequestration efficiency and mechanical stability of the nanocomposite, improving its practical applicability. Ultrafine dispersion of HZO nanoparticles within the composite matrix achieved a saturable phosphate adsorption capacity exceeding 64.41 mg/g at 298 K. Crucially, selective phosphate adsorption by HZO@CS-PEI remained effective in water containing high concentrations of coexisting anions and organic matter. The synergistic application of spectroscopic analyses and density functional theory (DFT) calculations revealed three distinct interaction mechanisms between HZO@CS-PEI and phosphate: inner-sphere complexation, hydrogen bonding, and electrostatic interactions. Furthermore, the used HZO@CS-PEI could be effectively regenerated with 0.1 mol/L NaOH for repeat use. In the column adsorption tests, phosphate-contaminated water was successfully treated by HZO@CS-PEI columns over 2750 bed volumes (BV), confirming operational stability under dynamic flow conditions.
研究领域:
环境科学
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材料科学
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高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yuhao Zhang,Luting Yan,Lei Tian,Qi Guo,Maosheng Sang,Shouyi Dou,Falan Li,Qingqing Yang,Xia Sun,Yemin Guo,Yanyan Zhang
Vibrio parahaemolyticus ( VP ) is one of the most common pathogens in aquatic products, and its study using electrochemiluminescence is still relatively rare. In this study, an electrochemiluminescent (ECL) biosensor was developed to detect VP in aquatic products using AuNPs modified PEI/MWCNTs (AuNPs@PEI/MWCNTs) as a substrate material and ordered mesoporous carbon (OMC) adsorbed Ru(bpy) 3 2+ (OMC@Ru(bpy) 3 2+ ) as a luminescent material. To increase the conductivity of the biosensor and offer a favorable loading environment for the immobilization of the luminescent probe, AuNPs@PEI/MWCNTs are employed as the substrate. Meanwhile, the OMC@Ru(bpy) 3 2+ functionalized DNA probe acts as a luminescent and capture probe to generate ECL signals and specifically recognize different concentrations of VP . The biosensor has good selectivity and stability and has been successfully applied to the detection of VP in scallops. This method not only expands the potential uses of bioprobe-based ECL biosensors, but also offers a new and effective approach used to detect food-borne pathogens in aquatic products.
研究领域:
食品科学
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生物技术
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分析化学
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高影响因子
危险品化学品经营许可证（带存储）